Test Position

Discussion of anything and everything relating to chess playing software and machines.

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F. Bluemers
Posts: 880
Joined: Thu Mar 09, 2006 11:21 pm
Location: Nederland

Test Position

Post by F. Bluemers »

Another (boring) one where nullmove seems to fail
[d]3r3k/4R3/7P/2n5/8/1P6/2B5/2K5 b - -
1. ..Nb3 !
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michiguel
Posts: 6401
Joined: Thu Mar 09, 2006 8:30 pm
Location: Chicago, Illinois, USA

Re: Test Position

Post by michiguel »

F. Bluemers wrote:Another (boring) one where nullmove seems to fail
[d]3r3k/4R3/7P/2n5/8/1P6/2B5/2K5 b - -
1. ..Nb3 !

Gaviota needs 7 seconds (ADM 24 Ghx 2x). The score is not good though.

Miguel

Code: Select all

+-----------------+
| . . . r . . . k | [Black]
| . . . . R . . . |
| . . . . . . . P |
| . . n . . . . . |    Castling: 
| . . . . . . . . |    ep: -
| . P . . . . . . |
| . . B . . . . . |
| . . K . . . . . |
+-----------------+

analyze
********* Starts iterative deepening, thread = 0
set timer to infinite
        25   1       0.0    -6.53  Nxb3+ 2.Bxb3
        37   1       0.0    -3.67  Nd3+ 2.Kd2
        69   1       0.0    -3.55  Rc8
        72   1       0.0    -3.50  Rf8
        82   1       0.0    -3.39  Kg8
       307   2       0.0    -3.68  Kg8 2.h7+ Kh8
      1033   2       0.0    -3.58  Rc8 2.Kd2 Rd8+ 3.Kc3
      1423   2       0.0    -3.42  Rb8 2.Kb2
      1690   3       0.0      :-(  Rb8
      2720   3       0.0    -3.58  Rc8 2.Kd2 Rd8+ 3.Kc3
      7059   4       0.0    -3.65  Rc8 2.Kb2 Rb8 3.Kc3
     12481   4       0.0    -3.60  Nd3+ 2.Bxd3 Rxd3 3.b4 Rb3 4.Rb7
     37370   5       0.1    -3.66  Nd3+ 2.Kb1 Nf4 3.Be4 Nd5 4.Bxd5 Rxd5
     44906   5       0.1    -3.62  Rc8 2.Kd2 Rf8 3.Rh7+ Kg8 4.Rg7+ Kh8
                                   5.b4 Rf2+ 6.Kd1
     79631   6       0.2    -3.82  Rc8 2.Kb2 Rb8 3.Rc7 Ne6 4.Re7
    101973   6       0.3    -3.66  Nd3+ 2.Kb1 Nf4 3.Be4 Rb8 4.Rh7+ Kg8
                                   5.Rg7+ Kf8 6.Kc2
    142195   6:      0.4    -3.66  Nd3+ 2.Kb1 Nf4 3.Be4 Rb8 4.Rh7+ Kg8
                                   5.Rg7+ Kf8 6.Kc2
    250785   7       0.6    -3.75  Nd3+ 2.Kb1 Nb4 3.Bf5 Nc6 4.Rh7+ Kg8
                                   5.Rc7 Nd4 6.h7+ Kh8
    313576   7:      0.8    -3.75  Nd3+ 2.Kb1 Nb4 3.Bf5 Nc6 4.Rh7+ Kg8
                                   5.Rc7 Nd4 6.h7+ Kh8
    515645   8       1.3    -3.63  Nd3+ 2.Kb1 Nb4 3.Bg6 Nd5 4.Rh7+ Kg8
                                   5.Rf7 Kh8 6.h7 Rb8 7.Kb2
    595821   8:      1.5    -3.63  Nd3+ 2.Kb1 Nb4 3.Bg6 Nd5 4.Rh7+ Kg8
                                   5.Rf7 Kh8 6.h7 Rb8 7.Kb2
    921669   9       2.1    -3.72  Nd3+ 2.Kb1 Nb4 3.Bg6 Nc6 4.Rh7+ Kg8
                                   5.Rc7 Nb4 6.h7+ Kh8 7.Bf5 Rf8
   1109309   9:      2.6    -3.72  Nd3+ 2.Kb1 Nb4 3.Bg6 Nc6 4.Rh7+ Kg8
                                   5.Rc7 Nb4 6.h7+ Kh8 7.Bf5 Rf8
   2330847  10       5.1    -3.75  Nd3+ 2.Kb1 Nb4 3.Bg6 Rb8 4.Kb2 Rd8 5.h7
                                   Nc6 6.Rc7 Ne5 7.Be4 Rd2+ 8.Kc3
   3170289  10       7.0      :-)  Nxb3+
   8057623  10      17.4    -2.51  Nxb3+ 2.Kb2 Nd4 3.Be4 Rb8+ 4.Kc3 Nb5+
                                   5.Kc2 Nd6 6.Rh7+ Kg8 7.Rg7+ Kf8 8.Bd5
                                   Rc8+ 9.Kd3 Rc5
   8238277  10:     17.9    -2.51  Nxb3+ 2.Kb2 Nd4 3.Be4 Rb8+ 4.Kc3 Nb5+
                                   5.Kc2 Nd6 6.Rh7+ Kg8 7.Rg7+ Kf8 8.Bd5
                                   Rc8+ 9.Kd3 Rc5
  14209877  11      29.6    -2.55  Nxb3+ 2.Kb2 Nd4 3.Be4 Rb8+ 4.Kc1 Rd8
                                   5.Rh7+ Kg8 6.Rb7 Kh8 7.h7 Re8 8.Bd3
                                   Ne2+ 9.Kd2 Nf4
  14802554  11:     31.2    -2.55  Nxb3+ 2.Kb2 Nd4 3.Be4 Rb8+ 4.Kc1 Rd8
                                   5.Rh7+ Kg8 6.Rb7 Kh8 7.h7 Re8 8.Bd3
                                   Ne2+ 9.Kd2 Nf4
  21252388  12      44.7    -2.53  Nxb3+ 2.Kb2 Nd4 3.Be4 Nb5 4.Kc2 Nd4+
                                   5.Kc3 Nb5+ 6.Kb4 Nd6 7.Bd3 Ne8 8.Bf5
                                   Nf6 9.Rb7 Nd5+ 10.Kc5
  23621865  12:     50.3    -2.53  Nxb3+ 2.Kb2 Nd4 3.Be4 Nb5 4.Kc2 Nd4+
                                   5.Kc3 Nb5+ 6.Kb4 Nd6 7.Bd3 Ne8 8.Bf5
                                   Nf6 9.Rb7 Nd5+ 10.Kc5
  36902273  13      76.9    -2.54  Nxb3+ 2.Kb2 Nd4 3.Be4 Nb5 4.h7 Nd6
                                   5.Bg6 Rb8+ 6.Kc3 Rb7 7.Re6 Nb5+ 8.Kd2
                                   Rd7+ 9.Bd3 Nc7 10.Rc6
  44736322  13:     92.2    -2.54  Nxb3+ 2.Kb2 Nd4 3.Be4 Nb5 4.h7 Nd6
                                   5.Bg6 Rb8+ 6.Kc3 Rb7 7.Re6 Nb5+ 8.Kd2
                                   Rd7+ 9.Bd3 Nc7 10.Rc6
 146652608  14     284.5    -2.54  Nxb3+ 2.Kb2 Nd4 3.Be4 Nb5 4.h7 Nd6
                                   5.Bg6 Rb8+ 6.Kc2 Ra8 7.Kd1 Ra1+ 8.Ke2
                                   Ra8 9.Rd7 Nc4 10.Bd3 Ra2+ 11.Kf3
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zullil
Posts: 6442
Joined: Tue Jan 09, 2007 12:31 am
Location: PA USA
Full name: Louis Zulli

Re: Test Position

Post by zullil »

F. Bluemers wrote:Another (boring) one where nullmove seems to fail
[d]3r3k/4R3/7P/2n5/8/1P6/2B5/2K5 b - -
1. ..Nb3 !
RobboLito-85g3 (x86_64) on a 2 GHz Core 2 Duo:

Code: Select all

 9 +1.89 1.... Nd3+ 2.Kb1 Kg8 3.Bxd3 Rxd3 4.Kc2 Rh3 5.Rg7+ Kh8 
 9 +2.04 1.... Nd3+ 2.Kb1 Kg8 3.Re2 Nb4 4.Bf5 Rf8 5.Rg2+ Kh8 6.Be4 Re8  (0.02)
10 +1.96 1.... Nd3+ 2.Kb1 Kg8 3.Re2 Nb4 4.Bf5 Rf8 5.Rg2+ Kh8 6.Be4 Re8  (0.02)
10 +1.97 1.... Nd3+ 2.Kb1 Kg8 3.Rb7 Rd4 4.Rc7 Rd8 5.Rc3 Nb4 6.Rg3+ Kh8 7.Be4 Re8  (0.03)
11 +2.15 1.... Nd3+ 2.Kb1 Kg8 3.Rg7+ Kh8 4.Rc7 Kg8 5.Rc3 Nb4 6.Be4 Kh8 7.Rc7 Re8 8.Rc4 Rb8 9.Kb2  (0.06)
12 +2.15 1.... Nd3+ 2.Kb1 Kg8 3.Rg7+ Kh8 4.Rc7 Kg8 5.Rc3 Nb4 6.Be4 Kh8 7.Rc7 Re8 8.Rc4 Rb8 9.Kb2  (0.15)
13 +2.35 1.... Nd3+ 2.Kb1 Kg8 3.Rg7+ Kh8 4.Rc7 Kg8 5.Rc3 Nf4 6.b4 Kh8 7.b5 Rb8 8.Ka1 Kg8 9.Rc4 Nd5 10.Rg4+ Kf7 11.h7 Ne3  (0.26)
14 +2.27 1.... Nd3+ 2.Kb1 Kg8 3.Rg7+ Kh8 4.Rc7 Kg8 5.Rc3 Nf4 6.b4 Kh8 7.b5 Rb8 8.Ka1 Kg8 9.Rc4 Nd5 10.Rg4+ Kf7 11.h7 Ne3  (0.34)
14 +2.35 1.... Nd3+ 2.Kb1 Kg8 3.Rg7+ Kh8 4.Rc7 Kg8 5.Rc3 Nf4 6.b4 Kh8 7.b5 Rb8 8.Ka1 Kg8 9.Rc4 Nd5 10.Rg4+ Kf7 11.h7 Ne3  (0.39)
15 +2.27 1.... Nd3+ 2.Kb1 Kg8 3.Rg7+ Kh8 4.Rc7 Kg8 5.Rc3 Nf4 6.b4 Kh8 7.b5 Rb8 8.Ka1 Kg8 9.Rc4 Nd5 10.Rc5 Ne3 11.Be4 Re8  (0.42)
15 +2.32 1.... Nd3+ 2.Kb1 Kg8 3.Rg7+ Kh8 4.Rc7 Kg8 5.Rc3 Nf4 6.b4 Kh8 7.b5 Rb8 8.Ka1 Nd5 9.Rf3 Kg8 10.Rg3+ Kh8 11.Bd3 Nc3  (0.47)
16 +2.37 1.... Nd3+ 2.Kb1 Kg8 3.Rg7+ Kh8 4.Rc7 Kg8 5.Rc3 Nf4 6.b4 Kh8 7.b5 Rb8 8.Ka1 Nd5 9.Rf3 Kg8 10.Rg3+ Kh8 11.Bd3 Nc3 12.Rg5  (0.75)
17 +2.42 1.... Nd3+ 2.Kb1 Nb4 3.Be4 Nd5 4.Rh7+ Kg8 5.Kb2 Nf6 6.Rg7+ Kh8 7.Bc2 Nd5 8.Rh7+ Kg8 9.Rb7 Ne3 10.Be4 Nd1+ 11.Kc2 Ne3+ 12.Kc3 Nd5+ 13.Kb2 Nf6  (1.72)
18 +2.56 1.... Nd3+ 2.Kb1 Nb4 3.Be4 Nd5 4.Rh7+ Kg8 5.Kb2 Nf6 6.Rg7+ Kh8 7.Bc2 Nd5 8.Rh7+ Kg8 9.Rb7 Ne3 10.Be4 Nd1+ 11.Kc2 Ne3+ 12.Kc3 Nd5+ 13.Kd2 Nf6+ 14.Bd3 Ne4+ 15.Ke3  (3.17)
19 +2.64 1.... Nd3+ 2.Kb1 Nb4 3.Be4 Nd5 4.Rh7+ Kg8 5.Kb2 Nf6 6.Rg7+ Kh8 7.Bc2 Rb8 8.Rf7 Nd5 9.Bd3 Nb4 10.Bb1 Nd5 11.Be4 Ne3 12.Rh7+ Kg8 13.Rd7 Re8 14.Bb1 Rb8 15.Kc3 Rc8+ 16.Kd4  (5.76)
20 +2.64 1.... Nd3+ 2.Kb1 Nb4 3.Be4 Nd5 4.Rh7+ Kg8 5.Kb2 Nf6 6.Rg7+ Kh8 7.Bc2 Rb8 8.Rf7 Nd5 9.Bd3 Nb4 10.Bf5 Kg8 11.Ra7 Nc6 12.Rg7+ Kh8 13.Rh7+ Kg8 14.Rd7 Ne5 15.Re7 Nf3 16.Kc3  (6.51)
20 +2.56 1.... Nxb3+ 2.Bxb3  (8.24)
20 +2.48 1.... Nxb3+ 2.Bxb3  (8.86)
20 +2.36 1.... Nxb3+ 2.Bxb3  (9.57)
20 +2.18 1.... Nxb3+ 2.Bxb3  (10.46)
20 +1.91 1.... Nxb3+ 2.Bxb3  (11.57)
20 +1.51 1.... Nxb3+ 2.Bxb3  (12.88)
20 +0.91 1.... Nxb3+ 2.Bxb3  (14.67)
20 +0.59 1.... Nxb3+ 2.Bxb3 Rd6 3.Be6 Ra6 4.Kd2 Ra7 5.Bd7 Ra6 6.Bf5 Rxh6 7.Kd3 Kg8 8.Rc7 Kf8 9.Kd4 Rf6 10.Ke5 Rf7 11.Rc4 Ra7 12.Be6 Kg7 13.Rg4+ Kh6 14.Bd5 Re7+ 15.Kf5  (22.50)
21 +0.62 1.... Nxb3+ 2.Bxb3 Rd6 3.Be6 Ra6 4.Kd2 Ra7 5.Bd7 Ra6 6.Bf5 Rxh6 7.Kd3 Kg8 8.Rc7 Kf8 9.Kd4 Rf6 10.Ke5 Rf7 11.Rc4 Ra7 12.Rh4 Rg7 13.Rh8+ Rg8 14.Rh6 Rg7 15.Be4 Re7+ 16.Kd4 Kf7  (24.57)
22 +0.62 1.... Nxb3+ 2.Bxb3 Rd6 3.Be6 Ra6 4.Kd2 Ra7 5.Bd7 Ra6 6.Bf5 Rxh6 7.Kd3 Kg8 8.Rc7 Kf8 9.Kd4 Rf6 10.Ke5 Rf7 11.Rc4 Ra7 12.Rh4 Rg7 13.Rh8+ Rg8 14.Rh6 Rg7 15.Be4 Re7+ 16.Kd4 Kf7  (26.67)
23 +0.62 1.... Nxb3+ 2.Bxb3 Rd6 3.Be6 Ra6 4.Kd2 Ra7 5.Bd7 Ra6 6.Bf5 Rxh6 7.Kd3 Kg8 8.Rc7 Kf8 9.Kd4 Rf6 10.Ke5 Rf7 11.Rc4 Ra7 12.Rh4 Rg7 13.Rh8+ Rg8 14.Rh6 Rg7 15.Be4 Re7+ 16.Kd5 Rg7 17.Rf6+ Ke8  (30.36)
24 +0.62 1.... Nxb3+ 2.Bxb3 Rd6 3.Be6 Ra6 4.Kd2 Ra7 5.Bd7 Ra6 6.Bf5 Rxh6 7.Kd3 Kg8 8.Rc7 Kf8 9.Kd4 Rf6 10.Ke5 Rf7 11.Rc4 Ra7 12.Rh4 Rg7 13.Rh8+ Rg8 14.Rh6 Rg7 15.Be4 Re7+ 16.Kd5 Rg7 17.Rf6+ Ke8  (36.66)
25 +0.62 1.... Nxb3+ 2.Bxb3 Rd6 3.Be6 Ra6 4.Kd2 Ra7 5.Bd7 Ra6 6.Bf5 Rxh6 7.Kd3 Kg8 8.Rc7 Kf8 9.Kd4 Rf6 10.Ke5 Rf7 11.Rc4 Ra7 12.Rh4 Rg7 13.Rh8+ Rg8 14.Rh6 Rg7 15.Be4 Re7+ 16.Kd5 Ke8 17.Kd4 Kf7  (42.62)
26 +0.62 1.... Nxb3+ 2.Bxb3 Rd6 3.Be6 Ra6 4.Kd2 Ra7 5.Bd7 Ra6 6.Bf5 Rxh6 7.Kd3 Kg8 8.Rc7 Kf8 9.Kd4 Rf6 10.Ke5 Rf7 11.Rc4 Ra7 12.Rh4 Kg8 13.Rh3 Rb7 14.Rh6 Ra7 15.Bd3 Rd7 16.Rg6+ Kf7 17.Rf6+ Kg7  (58.81)
26 +0.62 1.... Nxb3+ 2.Bxb3 Rd6 3.Be6 Ra6 4.Kd2 Ra7 5.Bd7 Ra6 6.Bf5 Rxh6 7.Kd3 Kg8 8.Rc7 Kf8 9.Kd4 Rf6 10.Ke5 Rf7 11.Rc4 Ra7 12.Rh4 Kg8 13.Rh3 Rb7 14.Rh6 Ra7 15.Bd3 Re7+ 16.Kf6 Rc7  (65.95)
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zullil
Posts: 6442
Joined: Tue Jan 09, 2007 12:31 am
Location: PA USA
Full name: Louis Zulli

Re: Test Position

Post by zullil »

F. Bluemers wrote:Another (boring) one where nullmove seems to fail
[d]3r3k/4R3/7P/2n5/8/1P6/2B5/2K5 b - -
1. ..Nb3 !
Stockfish-1.6 (x86_64) 2 Threads:

Code: Select all

 1 +3.47 1.... Rb8  (0.04)
 2 +3.91 1.... Rb8 2.Kd2 Nxb3+ 3.Ke3  (0.04)
 2 +3.51 1.... Kg8 2.Rg7+ Kh8  (0.04)
 3 +3.79 1.... Kg8 2.Rg7+ Kh8 3.b4 Nd3+ 4.Bxd3 Rxd3  (0.04)
 3 +3.51 1.... Nd3+ 2.Bxd3 Rxd3 3.b4 Rd6  (0.05)
 4 +3.59 1.... Nd3+ 2.Bxd3 Rxd3 3.Kc2 Rg3  (0.05)
 5 +3.31 1.... Nd3+ 2.Bxd3 Rxd3 3.b4 Rd6 4.b5 Rxh6  (0.05)
 6 +3.31 1.... Nd3+ 2.Kb1 Kg8 3.Bxd3 Rxd3 4.Kc2 Rg3  (0.05)
 7 +3.35 1.... Nd3+ 2.Kb1 Kg8 3.Rc7 Kh8 4.Rc3 Nf4 5.Rf3 Nd5 6.Rf7  (0.06)
 8 +3.35 1.... Nd3+ 2.Kb1 Kg8 3.Rc7 Kh8 4.Rc3 Nf4 5.Rf3 Nd5 6.Rf7  (0.06)
 9 +3.35 1.... Nd3+ 2.Kb1 Kg8 3.Rc7 Kh8 4.Rc3 Nf4 5.Rf3 Nd5 6.Rf7  (0.06)
10 +3.51 1.... Nd3+ 2.Kb1 Kg8 3.Rc7 Kh8 4.Rc3 Nf4 5.Rf3 Ne6 6.Kb2 Rc8 7.Rf7 Kg8 8.Bg6  (0.09)
11 +3.51 1.... Nd3+ 2.Kb1 Kg8 3.Rc7 Kh8 4.Rc3 Nf4 5.Rf3 Ne6 6.Kb2 Rc8 7.Rf7 Kg8 8.Bg6  (0.10)
12 +3.55 1.... Nd3+ 2.Kb1 Kg8 3.Rc7 Kh8 4.Rf7 Kg8 5.Rb7 Rd4 6.Bxd3 Rxd3 7.Kc2 Rh3 8.Rg7+ Kf8  (0.14)
13 +3.59 1.... Nd3+ 2.Kb1 Kg8 3.Rc7 Kh8 4.Rf7 Kg8 5.Rb7 Rd4 6.Rg7+ Kh8 7.Re7 Rd8 8.Bxd3 Rxd3 9.Kc2 Rd6 10.b4 Rxh6 11.b5 Kg8  (0.22)
14 +3.79 1.... Nd3+ 2.Kb1 Kg8 3.Rc7 Kh8 4.Rc3 Nf4 5.Kb2 Kg8 6.Rc7 Rd6 7.h7+ Kh8 8.Rc8+  (0.54)
15 +3.71 1.... Nd3+ 2.Kb1 Kg8 3.Rc7 Kh8 4.Rc3 Nf4 5.Kb2 Ne6 6.Rc4 Nd4 7.Be4 Kg8 8.Rc7 Rb8 9.Rg7+ Kf8 10.Kc3 Nb5+ 11.Kc4 Nd6+ 12.Kd4 Nxe4 13.Kxe4 Rxb3  (0.79)
15 +2.94 1.... Nxb3+ 2.Bxb3 Rd6 3.h7 Rc6+ 4.Kb2 Rc7 5.Rxc7  (1.14)
16 +2.34 1.... Nxb3+ 2.Kb2 Nd4 3.Be4 Rf8 4.Rh7+ Kg8 5.Rd7 Nf5 6.h7+ Kh8 7.Kc3 Ng3 8.Bd3 Nf5 9.Kb3 Rb8+ 10.Kc2 Rf8 11.Kc3 Ne3 12.Kd4  (3.33)
17 +1.65 1.... Nxb3+ 2.Kb2 Nd4 3.Be4 Rf8 4.Re5 Rb8+ 5.Kc1 Rf8 6.Bd3 Nc6 7.Rh5 Rd8 8.Bg6 Rd6 9.Bf5 Nd4 10.Bd3 Re6  (5.18)
18 +1.09 1.... Nxb3+ 2.Kb2 Nd4 3.Be4 Rf8 4.Rh7+ Kg8 5.Rd7 Nf5 6.h7+ Kh8 7.Kc3 Ng3 8.Bg6 Ne2+ 9.Kc4 Rc8+ 10.Kb5 Nf4 11.Be4 Ne6 12.Re7 Rb8+ 13.Kc4 Ng5 14.Bg6 Nxh7 15.Bxh7 Rc8+ 16.Kd4 Rd8+ 17.Ke3 Rb8 18.Kd4 Rf8  (8.57)
19 +1.09 1.... Nxb3+ 2.Kb2 Nd4 3.Be4 Rf8 4.Rh7+ Kg8 5.Rd7 Nf5 6.h7+ Kh8 7.Kc3 Ng3 8.Bg6 Ne2+ 9.Kd2 Nf4 10.Be4 Nh5 11.Rb7 Nf6 12.Bg6 Nxh7 13.Bxh7 Rd8+ 14.Kc3 Ra8 15.Kd4 Ra4+ 16.Ke5 Rh4  (12.51)
20 +1.01 1.... Nxb3+ 2.Kb2 Nd4 3.Be4 Rf8 4.Rh7+ Kg8 5.Rd7 Nf5 6.h7+ Kh8 7.Kc3 Ng7 8.Bd3 Ne6 9.Re7 Ng5 10.Rb7 Rc8+ 11.Kb2 Nxh7 12.Rxh7+ Kg8 13.Ra7 Rc6 14.Kb3 Kf8 15.Bf5 Rc5 16.Bg4  (25.56)
21 +1.05 1.... Nxb3+ 2.Bxb3 Rd6 3.Be6 Rb6 4.Kd2 Rb2+ 5.Kc3 Rb7 6.Bd7 Rb6 7.Kd4 Rxh6 8.Bf5 Kg8 9.Be4 Kf8 10.Rc7 Rh4 11.Ke5 Ke8 12.Bf5 Rh5 13.Ke4 Rh4+ 14.Ke3 Kd8  (58.95)
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zullil
Posts: 6442
Joined: Tue Jan 09, 2007 12:31 am
Location: PA USA
Full name: Louis Zulli

Re: Test Position

Post by zullil »

F. Bluemers wrote:Another (boring) one where nullmove seems to fail
[d]3r3k/4R3/7P/2n5/8/1P6/2B5/2K5 b - -
1. ..Nb3 !
Crafty-23.1 doesn't see (despite 8 cores and 25M nps):

Code: Select all

Crafty v23.1 (8 cpus)

White(1): book off
book file disabled.
White(1): ponder off
pondering disabled.
White(1): egtb=off
White(1): setboard 3r3k/4R3/7P/2n5/8/1P6/2B5/2K5 b - -
Black(1): st 180
search time set to 180.00.
Black(1): display stats
display statistics at end of each search.
Black(1): display

       +---+---+---+---+---+---+---+---+
    8  |   | . |   |<R>|   | . |   |<K>|
       +---+---+---+---+---+---+---+---+
    7  | . |   | . |   |-R-|   | . |   |
       +---+---+---+---+---+---+---+---+
    6  |   | . |   | . |   | . |   |-P-|
       +---+---+---+---+---+---+---+---+
    5  | . |   |<N>|   | . |   | . |   |
       +---+---+---+---+---+---+---+---+
    4  |   | . |   | . |   | . |   | . |
       +---+---+---+---+---+---+---+---+
    3  | . |-P-| . |   | . |   | . |   |
       +---+---+---+---+---+---+---+---+
    2  |   | . |-B-| . |   | . |   | . |
       +---+---+---+---+---+---+---+---+
    1  | . |   |-K-|   | . |   | . |   |
       +---+---+---+---+---+---+---+---+
         a   b   c   d   e   f   g   h

Black(1): go
              time limit 3:00 (+0.00) (3:00)
              depth   time  score   variation (1)
starting thread 1
starting thread 2
starting thread 3
starting thread 4
starting thread 5
starting thread 6
starting thread 7
               10     0.03   3.35   1. ... Nd3+ 2. Kb1 Kg8 3. Rg7+ Kh8
                                    4. Rc7 Kg8 5. Rb7 Nc5 6. Rc7 <HT>
               10->   0.03   3.35   1. ... Nd3+ 2. Kb1 Kg8 3. Rg7+ Kh8   
                                    4. Rc7 Kg8 5. Rb7 Nc5 6. Rc7 <HT>
               11     0.05   3.35   1. ... Nd3+ 2. Kb1 Kg8 3. Rg7+ Kh8   
                                    4. Rc7 Kg8 5. Rb7 <HT>
               11->   0.05   3.35   1. ... Nd3+ 2. Kb1 Kg8 3. Rg7+ Kh8   
                                    4. Rc7 Kg8 5. Rb7 <HT> (s=3)
               12     0.11   3.35   1. ... Nd3+ 2. Kb1 Kg8 3. Rg7+ Kh8    
                                    4. Rc7 Kg8 5. Rb7 Kh8 6. Rg7 Nc5 7.
                                    Re7 Nd3 8. Bxd3 Rxd3 (s=2)
               12->   0.16   3.35   1. ... Nd3+ 2. Kb1 Kg8 3. Rg7+ Kh8    
                                    4. Rc7 Kg8 5. Rb7 Kh8 6. Rg7 Nc5 7.
                                    Re7 Nd3 8. Bxd3 Rxd3
               13     0.19   3.36   1. ... Nd3+ 2. Kb1 Kg8 3. Rg7+ Kh8   
                                    4. Rc7 Kg8 5. Rb7 Rd4 6. Rg7+ Kh8 7.
                                    Re7 Kg8 <HT>
               13->   0.23   3.36   1. ... Nd3+ 2. Kb1 Kg8 3. Rg7+ Kh8    
                                    4. Rc7 Kg8 5. Rb7 Rd4 6. Rg7+ Kh8 7.
                                    Re7 Kg8 <HT>
               14     0.57   3.63   1. ... Nd3+ 2. Kb1 Kg8 3. Rg7+ Kh8    
                                    4. Rf7 Kg8 5. Rb7 Rd4 6. Rg7+ <HT>
               14->   0.67   3.63   1. ... Nd3+ 2. Kb1 Kg8 3. Rg7+ Kh8    
                                    4. Rf7 Kg8 5. Rb7 Rd4 6. Rg7+ <HT>
               15     0.87   3.63   1. ... Nd3+ 2. Kb1 Kg8 3. Rg7+ Kh8    
                                    4. Rf7 Kg8 5. Rb7 Rd4 6. Rc7 Rd8 7.
                                    Rg7+ <HT>
               15->   1.00   3.63   1. ... Nd3+ 2. Kb1 Kg8 3. Rg7+ Kh8    
                                    4. Rf7 Kg8 5. Rb7 Rd4 6. Rc7 Rd8 7.
                                    Rg7+ <HT> (s=2)
               16     1.53   3.62   1. ... Nd3+ 2. Kb1 Kg8 3. Rg7+ Kh8    
                                    4. Rf7 Kg8 5. Rb7 Nc5 6. Rg7+ Kh8 7.
                                    Rh7+ Kg8 8. Rc7 Nd3 9. Re7 <HT>
               16->   1.70   3.62   1. ... Nd3+ 2. Kb1 Kg8 3. Rg7+ Kh8    
                                    4. Rf7 Kg8 5. Rb7 Nc5 6. Rg7+ Kh8 7.
                                    Rh7+ Kg8 8. Rc7 Nd3 9. Re7 <HT>
               17     2.64   3.63   1. ... Nd3+ 2. Kb1 Kg8 3. Rg7+ Kh8    
                                    4. Rf7 Kg8 5. Rb7 Nc5 6. Rg7+ Kh8 7.
                                    Rh7+ Kg8 8. Rc7 Nd3 9. Re7 Kh8 10.
                                    Bxd3 Rxd3 11. Kc2 Rh3
               17->   3.21   3.63   1. ... Nd3+ 2. Kb1 Kg8 3. Rg7+ Kh8    
                                    4. Rf7 Kg8 5. Rb7 Nc5 6. Rg7+ Kh8 7.
                                    Rh7+ Kg8 8. Rc7 Nd3 9. Re7 Kh8 10.
                                    Bxd3 Rxd3 11. Kc2 Rh3
               18     5.97   3.63   1. ... Nd3+ 2. Kb1 Kg8 3. Ra7 Kh8 4.  
                                    Ka1 Ne1 5. Be4 Nd3 6. Bf5 Kg8 7. Rg7+
                                    Kh8 8. Rc7 Kg8 9. Kb1 Kh8 10. Ra7 Nf4
                                    11. Kb2 Rd2+ 12. Kc3
               18->   6.51   3.63   1. ... Nd3+ 2. Kb1 Kg8 3. Ra7 Kh8 4.  
                                    Ka1 Ne1 5. Be4 Nd3 6. Bf5 Kg8 7. Rg7+
                                    Kh8 8. Rc7 Kg8 9. Kb1 Kh8 10. Ra7 Nf4
                                    11. Kb2 Rd2+ 12. Kc3
               19    10.49   3.63   1. ... Nd3+ 2. Kb1 Kg8 3. Ra7 Kh8 4.  
                                    Ka1 Ne1 5. Be4 Nd3 6. Bf5 Kg8 7. Rg7+
                                    Kh8 8. Rc7 Kg8 9. Kb1 Kh8 10. Ra7 Nf4
                                    11. Kb2 Rd2+ 12. Kc3
               19->  12.57   3.63   1. ... Nd3+ 2. Kb1 Kg8 3. Ra7 Kh8 4.  
                                    Ka1 Ne1 5. Be4 Nd3 6. Bf5 Kg8 7. Rg7+
                                    Kh8 8. Rc7 Kg8 9. Kb1 Kh8 10. Ra7 Nf4
                                    11. Kb2 Rd2+ 12. Kc3 (s=2)
               20    20.96   3.63   1. ... Nd3+ 2. Kb1 Kg8 3. Ra7 Kh8 4.  
                                    Ka1 Ne1 5. Be4 Nd3 6. Bf5 Kg8 7. Rg7+
                                    Kh8 8. Rc7 Kg8 9. Kb1 Nf4 10. Kc2 Nd5
                                    11. Be6+ <HT>
               20->  23.31   3.63   1. ... Nd3+ 2. Kb1 Kg8 3. Ra7 Kh8 4.  
                                    Ka1 Ne1 5. Be4 Nd3 6. Bf5 Kg8 7. Rg7+
                                    Kh8 8. Rc7 Kg8 9. Kb1 Nf4 10. Kc2 Nd5
                                    11. Be6+ <HT>
               21    57.91   3.66   1. ... Nd3+ 2. Kb1 Nb4 3. Bg6 Nd3 4.  
                                    Be4 Nc5 5. Bc2 Nd3 6. Rf7 Nb4 7. Be4
                                    Re8 8. Bf5 Kg8 9. Rd7 Rf8 10. Bh7+
                                    Kh8 11. Be4 Na6 12. h7 Nc5
               21->   1:11   3.66   1. ... Nd3+ 2. Kb1 Nb4 3. Bg6 Nd3 4.  
                                    Be4 Nc5 5. Bc2 Nd3 6. Rf7 Nb4 7. Be4
                                    Re8 8. Bf5 Kg8 9. Rd7 Rf8 10. Bh7+
                                    Kh8 11. Be4 Na6 12. h7 Nc5
               22     1:50   3.69   1. ... Nd3+ 2. Kb1 Nb4 3. Bg6 Nd3 4.  
                                    Rh7+ Kg8 5. Bf5 Nc5 6. Rc7 Nd3 7. Rg7+
                                    Kh8 8. Rf7 Ne1 9. Rh7+ Kg8 10. Rb7
                                    Nf3 11. b4 Rf8 12. Bd3 Ne5 13. Be4
                                    Rf1+ 14. Kc2 Rf2+ 15. Kc3
               22->   2:46   3.69   1. ... Nd3+ 2. Kb1 Nb4 3. Bg6 Nd3 4.  
                                    Rh7+ Kg8 5. Bf5 Nc5 6. Rc7 Nd3 7. Rg7+
                                    Kh8 8. Rf7 Ne1 9. Rh7+ Kg8 10. Rb7
                                    Nf3 11. b4 Rf8 12. Bd3 Ne5 13. Be4
                                    Rf1+ 14. Kc2 Rf2+ 15. Kc3 (s=2)
              time=3:00  mat=2  n=4623506429  fh=89%  nps=25.6M           
              extensions=298.0M qchecks=327.4M reduced=527.8M pruned=1206.2M
              predicted=0  evals=1829.7M  50move=0  EGTBprobes=0  hits=0
              SMP->  splits=846889  aborts=130018  data=79/512  elap=3:00
terminating SMP processes.
Black(1): Nd3+
              time used:   3:00
Top
F. Bluemers
Posts: 880
Joined: Thu Mar 09, 2006 11:21 pm
Location: Nederland

Re: Test Position

Post by F. Bluemers »

It actually is a position from a crafty game :D
[Event "BASEMENT_QUAD_2009-11-7 (1)"]
[Site "BASEMENT_QUAD"]
[Date "2009.12.27"]
[Round "15.2"]
[White "Crafty 23.1 JA"]
[Black "BugChess2"]
[Result "1/2-1/2"]

1. e4 g6 2. d4 Bg7 {-0.02/11 1.5} 3. Nc3 c6 4. Nf3 d6
{-0.06/11 1.0} 5. Be3 {+0.69/17 21} Nf6 6. Qd2 {+0.77/17
20} O-O {-0.22/15 1:10} 7. Bh6 b5 {-0.15/17 2:04} 8. Bd3
{+0.51/18 25} Bg4 {-0.09/17 50} 9. Bxg7 Kxg7 {+0.09/16
1:25} 10. e5 dxe5 {+0.57/18 1:10} 11. dxe5 Nfd7 {+0.49/17
52} 12. Qe3 Qc7 {+0.51/16 38} 13. e6 {+0.17/17 21} Bxf3
{+0.50/17 1:13} 14. gxf3 {+0.13/19 2:16} fxe6 {+0.73/16 49}
15. a4 {+0.01/18 2:28} b4 {+0.73/15 40} 16. Ne4 {+0.22/20
3:33} Qf4 17. Be2 {+0.20/20 2:34} a5 18. O-O-O {+0.25/19
2:20} Rf5 19. h4 {+0.34/18 2:01} h6 20. Ng3 {+0.40/21 3:06}
Rf7 {+0.27/17 1:21} 21. Rhg1 {+0.89/19 1:35} Kh8 22. Ne4
{+1.00/19 1:14} Kh7 {+0.07/17 50} 23. Rg4 {+1.08/20 1:14}
Qxe3+ 24. fxe3 {+0.98/20 25} Rg7 {-0.26/19 43} 25. Rg3
{+1.58/22 1:23} Ra7 26. Rdg1 {+1.53/22 1:15} Na6 {-0.58/20
1:00} 27. h5 {+1.57/22 14} g5 {-0.54/20 36} 28. Bd3
{+1.90/23 1:14} Kh8 29. f4 {+2.05/24 1:08} Nac5 {-0.50/20
35} 30. fxg5 {+2.11/23 1:08} Nxa4 {-0.68/21 1:05} 31. gxh6
Rxg3 {-0.77/21 30} 32. Rxg3 Nac5 {-0.87/21 23} 33. Rg7 Nxe4
{-0.95/22 13} 34. Bxe4 Ne5 {-0.95/21 40} 35. Rg5 Nf7
36. Rc5 {+2.06/20 1:11} Nxh6 {-0.99/21 1:12} 37. Rxc6
{+1.86/20 14} Ng4 {-1.04/20 22} 38. Rxe6 {+1.91/19 57} Nxe3
39. b3 {+1.91/18 1:19} Ng4 {-0.76/20 31} 40. h6 {+2.18/20
1:47} Nf6 {-0.95/22 33} 41. Bd3 {+1.98/20 49} Nd5 42. Rc6
{+2.26/20 1:20} Ra8 43. Rc5 {+2.14/19 49} Nf6 {-1.11/19 39}
44. Rf5 {+2.29/18 49} Ng4 {-1.11/21 57} 45. Rf7 {+2.61/20
49} Ne5 46. Rh7+ {+2.46/20 39} Kg8 47. Be4 {+2.46/20 43}
Ra7 {-1.53/22 55} 48. Rg7+ Kh8 {-1.53/22 40} 49. Bf5 Rb7
{-1.31/20 35} 50. Kd1 Nc6 {-1.34/20 50} 51. Rf7 {+2.64/19
3} Rb8 {-1.47/21 43} 52. Be4 Rd8+ {-1.46/21 40} 53. Kc1
{+2.69/19 54} Nd4 54. Rxe7 {+2.86/18 37} Ne2+ 55. Kb2
{+2.93/20 31} Nc3 {-1.64/22 17} 56. Bd3 {+3.13/20 26} a4
{-1.52/20 35} 57. bxa4 Nxa4+ 58. Kc1 {+3.15/19 17} b3
{-1.51/19 26} 59. cxb3 {+3.32/19 36} Nc5 {-1.21/18 25}
60. Bc2 {+4.00/18 35} Nxb3+ {-0.79/19 41} 61. Kb2 {+2.39/17
47} Nd4 62. Be4 {+2.25/18 29} Rf8 {-0.65/19 43} 63. Rh7+
{+0.08/18 17} Kg8 64. Rd7 Nf5 65. h7+ Kh8 66. Ka2 {+0.02/17
22} Ng7 {-0.04/19 21} 67. Rd5 {+0.02/17 21} Ne6 {-0.03/20
48} 68. Rb5 {+0.01/17 36} Rf4 {-0.02/20 28} 69. Bg6
{+0.01/17 18} Nf8 {-0.01/21 35} 70. Rb8 Kg7 {-0.01/21 24}
71. Bd3 Nxh7 {+0.00/17 20} 72. Rb6 Nf6 {+0.00/19 23}
73. Bc2 {+0.01/17 22} Nd5 {+0.00/20 21} 74. Rb7+ {+0.01/16
16} Kf6 {+0.00/21 22} 75. Kb2 {+0.01/16 15} Rf2 {+0.00/20
23} 76. Rb8 {+0.01/17 15} Ke6 {+0.00/20 26} 77. Rh8
{+0.01/16 14} Nb4 {+0.00/18 27} 78. Rh6+ {+0.01/17 13} Kd7
{+0.00/21 22} 79. Rh7+ Kd6 {+0.00/20 24} 80. Rh6+ {+0.01/18
15} Ke7 {+0.00/19 8} 81. Rh7+ Kd8 {+0.00/19 18} 82. Rh8+
{+0.01/19 12} Kd7 {+0.00/19 11} 83. Rh7+ Kd6 {+0.00/19 21}
84. Rh6+ Kd5 {+0.00/20 29} 85. Rh5+ Ke6 {+0.00/20 6}
86. Rh6+ Kd5 {+0.00/21 31} 87. Rh5+ Kc4 {+0.00/22 19}
88. Rh4+ Kc5 89. Rh5+ Kd6 90. Rh6+ {Drawn by 3-fold
repetition} 1/2-1/2
Rybka 2.2n2 has some problems as well,especially if egtb's are turned off:

Code: Select all

Rybka 2.2n2 1 core
 12.02	 0:01 	-2.65 	1...Pa6 2.Kb2 Pb4 3.Le4 Pd3+ 4.Kc3 Pc5 5.Lf5 Tf8 6.Lb1 (339.841) 239
 13.01	 0:02 	-2.69 	1...Pa6 2.Kb2 Tb8 3.Kc3 Tc8+ 4.Kd2 Td8+ 5.Ke3 Pb4 6.Th7+ Kg8 7.Tg7+ Kh8 8.Lf5 (519.118) 245
 13.02	 0:02 	-2.48 	1...Pd3+ 2.Kb1 Kg8 3.Tg7+ Kh8 4.Tf7 Kg8 5.Tb7 Pc5 6.Tg7+ Kh8 7.Th7+ (674.840) 244
 14.01	 0:03 	-2.47 	1...Pd3+ 2.Kb1 Kg8 3.Tb7 Pc5 4.Tg7+ Kh8 5.Th7+ Kg8 6.Kb2 Tb8 7.Ta7 Pe6 8.Le4 (752.640) 243
 15.01	 0:03 	-2.47 	1...Pd3+ 2.Kb1 Kg8 3.Tb7 Pc5 4.Tg7+ Kh8 5.Th7+ Kg8 6.Kb2 Tb8 7.Ta7 Pe6 8.Ld3 (873.624) 242
 16.01	 0:09 	-2.44 	1...Pd3+ 2.Kb1 Pb4 3.Lg6 Pd3 4.Lf5 Kg8 5.Tg7+ Kh8 6.Th7+ Kg8 7.Ta7 Kh8 8.Kc2 (2.344.766) 243
 17.01	 0:11 	-2.47 	1...Pd3+ 2.Kb1 Pb4 3.Lg6 Pd3 4.Le4 Pc5 5.Lc2 Tb8 6.Ka2 Pa6 (2.636.262) 239
 18.01	 0:13 	-2.47 	1...Pd3+ 2.Kb1 Pb4 3.Lg6 Pd3 4.Le4 Pc5 5.Lc2 Tb8 6.Ka2 Pa6 (2.985.199) 233
 19.01	 0:44 	-2.54 	1...Pd3+ 2.Kb1 Kg8 3.Tb7 Td4 4.Tb6 Kh8 5.Lxd3 Txd3 6.Kc2 Td8 7.b4 Kh7 8.b5 (10.152.679) 235
 19.07	 3:19 	-0.52 	1...Pxb3+ 2.Lxb3 Td6 3.Le6 Tb6 (61.182.528) 314
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royb
Posts: 566
Joined: Thu Mar 09, 2006 12:53 am

Re: Test Position

Post by royb »

Doch 1.2 finds ...Nxb3 almost instantly (0.13 secs) on my 3 GHz system:

1 +2.43 1.... Kg8 (0.00)
2 +2.55 1.... Kg8 2.Kb2 (0.00)
3 +2.54 1.... Kg8 2.Kb2 Rd2 (0.00)
4 +2.53 1.... Kg8 2.h7+ Kh8 3.Kb2 Ra8 (0.00)
5 +2.67 1.... Kg8 2.b4 Nd3+ 3.Bxd3 Rxd3 4.b5 (0.00)
5 +2.54 1.... Nd3+ 2.Bxd3 Rxd3 3.Kb2 Rd6 4.h7 Rd1 (0.00)
6 +2.59 1.... Nd3+ 2.Bxd3 Rxd3 3.Kb2 Rd6 4.h7 Rd3 5.b4 Rf3 (0.00)
7 +2.72 1.... Nd3+ 2.Bxd3 Rxd3 3.Kc2 Rh3 4.h7 Rf3 5.b4 Rf2+ 6.Kc3 (0.01)
8 +2.66 1.... Nd3+ 2.Kb1 Nb4 3.Kb2 Nxc2 4.Kxc2 Rd6 5.h7 Rc6+ 6.Kd2 Rc8 7.b4 Rf8 (0.02)
9 +2.77 1.... Nd3+ 2.Kb1 Nb4 3.Kb2 Nxc2 4.Kxc2 Rd6 5.h7 Rc6+ 6.Kd2 Rc8 7.b4 Rd8+ 8.Kc3 (0.05)
10 +2.76 1.... Nd3+ 2.Kb1 Nb4 3.Be4 Nd5 4.Bxd5 Rxd5 5.Kb2 Rc5 6.b4 Rc4 7.Kb3 Rc6 8.h7 Rd6 (0.10)
10 +2.71 1.... Nxb3+ 2.Bxb3 Rd6 3.Be6 Rd1+ 4.Kb2 Rh1 5.Re8+ Kh7 6.Bf5+ Kxh6 7.Rh8+ Kg5 8.Rxh1 Kxf5 9.Kc3 Ke4 10.Rh4+ Ke3 (0.13)
11 +2.71 1.... Nxb3+ 2.Bxb3 Rd6 3.Be6 Rd1+ 4.Kb2 Rh1 5.Re8+ Kh7 6.Bf5+ Kxh6 7.Rh8+ Kg5 8.Rxh1 Kxf5 9.Kc3 Ke4 10.Rh4+ Ke3 (0.16)
12 +1.94 1.... Nxb3+ 2.Bxb3 Rd6 3.Be6 Rd1+ 4.Kb2 Rd2+ 5.Kc3 Rd3+ 6.Kb4 Rd4+ 7.Kb5 Rh4 8.Bf5 Rxh6 9.Kc5 Kg8 10.Be6+ Kh8 11.Bc4 (0.28)
13 +2.58 1.... Nxb3+ 2.Bxb3 Rd6 3.Be6 Rd1+ 4.Kb2 Rd2+ 5.Kc3 Rd3+ 6.Kc2 Rd2+ 7.Kb3 Rd3+ 8.Ka2 Rd2+ 9.Ka3 Rh2 10.Re8+ Kh7 11.Bf5+ Kxh6 12.Rh8+ Kg5 13.Rxh2 Kxf5 (0.34)
14 +1.97 1.... Nxb3+ 2.Bxb3 Rd6 3.Be6 Rd1+ 4.Kb2 Rd2+ 5.Kc3 Rd3+ 6.Kc2 Rd2+ 7.Kb3 Rd3+ 8.Ka2 Rd2+ 9.Ka3 Rd3+ 10.Bb3 Rh3 11.Kb4 Rxh6 12.Bd5 (0.49)
15 +1.98 1.... Nxb3+ 2.Bxb3 Rd6 3.Be6 Rd1+ 4.Kb2 Rd2+ 5.Kc3 Rd3+ 6.Kc2 Rd2+ 7.Kb3 Rd3+ 8.Ka2 Rd2+ 9.Ka3 Rd3+ 10.Kb4 Rd4+ 11.Kc5 Rh4 12.Bd5 Rxh6 13.Ra7 (0.64)
16 +1.95 1.... Nxb3+ 2.Bxb3 Rd6 3.Be6 Rd1+ 4.Kb2 Rd2+ 5.Kc3 Rd3+ 6.Kc2 Rd2+ 7.Kb3 Rd3+ 8.Ka2 Rd2+ 9.Ka3 Rd3+ 10.Kb4 Rd4+ 11.Kc5 Rh4 12.Bd5 Rxh6 13.Ra7 Rh7 14.Ra8+ Kg7 (0.93)
17 +1.84 1.... Nxb3+ 2.Bxb3 Rd6 3.Be6 Ra6 4.Kc2 Ra7 5.Bd7 Ra6 6.Kc3 Rxh6 7.Bf5 Kg8 8.Be4 Kf8 9.Rd7 Re6 10.Kd4 Re7 11.Rd6 Kf7 12.Ra6 Kg7 13.Rg6+ Kf7 14.Rb6 Re6 (2.10)
18 +1.83 1.... Nxb3+ 2.Bxb3 Rd6 3.Be6 Ra6 4.Kc2 Ra7 5.Bd7 Ra6 6.Kc3 Rxh6 7.Bf5 Kg8 8.Be4 Kf8 9.Rd7 Re6 10.Kd4 Re7 11.Rd6 Kf7 12.Ra6 Kg7 13.Rg6+ Kf7 14.Rd6 Re8 15.Ra6 Rc8 16.Bd5+ Ke7 (3.42)
19 +1.82 1.... Nxb3+ 2.Bxb3 Rd6 3.Be6 Ra6 4.Kc2 Ra7 5.Bd7 Ra6 6.Kc3 Rxh6 7.Bf5 Kg8 8.Be4 Kf8 9.Rd7 Re6 10.Kd4 Re7 11.Rd6 Kf7 12.Ra6 Kg7 13.Rg6+ Kf7 14.Rd6 Re8 15.Ra6 Rc8 16.Ke5 Re8+ 17.Kf5 Ke7 18.Re6+ Kf7 (5.69)
20 +1.81 1.... Nxb3+ 2.Bxb3 Rd6 3.Be6 Ra6 4.Kc2 Ra7 5.Bd7 Ra6 6.Kc3 Rxh6 7.Bf5 Kg8 8.Be4 Kf8 9.Rd7 Re6 10.Kd4 Re7 11.Rd6 Kf7 12.Ra6 Kg7 13.Rg6+ Kf7 14.Rd6 Re8 15.Ra6 Kg7 16.Rg6+ Kf7 17.Rc6 Rb8 18.Bd5+ Ke7 19.Re6+ Kd7 (9.15)
21 +1.82 1.... Nxb3+ 2.Bxb3 Rd6 3.Be6 Ra6 4.Kc2 Ra7 5.Bd7 Ra6 6.Kc3 Rxh6 7.Bf5 Kg8 8.Kd4 Kf8 9.Rc7 Rf6 10.Ke5 Rf7 11.Rc6 Re7+ 12.Be6 Kg7 13.Kf5 Kh6 14.Bf7+ Kh7 15.Bd5 Rd7 16.Ke5 Re7+ 17.Kf6 Rd7 18.Rc5 Kh6 (12.11)
22 +1.82 1.... Nxb3+ 2.Bxb3 Rd6 3.Be6 Ra6 4.Kc2 Ra7 5.Bd7 Ra6 6.Kc3 Rxh6 7.Bf5 Kg8 8.Kd4 Kf8 9.Rc7 Rf6 10.Ke5 Rf7 11.Rc6 Ra7 12.Be6 Kg7 13.Bd5 Rd7 14.Re6 Rf7 15.Be4 Kf8 16.Rb6 Re7+ 17.Kf5 Rf7+ 18.Kg5 Rg7+ 19.Kf4 Rf7+ 20.Kg4 (17.81)
23 +1.84 1.... Nxb3+ 2.Bxb3 Rd6 3.Be6 Ra6 4.Kc2 Ra7 5.Bd7 Ra6 6.Bf5 Rxh6 7.Kd3 Kg8 8.Kd4 Kf8 9.Rc7 Rf6 10.Ke5 Rf7 11.Rc6 Ra7 12.Rh6 Re7+ 13.Kd6 Rf7 14.Be4 Rf1 15.Rh7 Rf7 16.Rh3 Kg7 17.Ke6 Rf6+ 18.Ke5 Rf7 19.Rh7+ Kf8 20.Rh6 Re7+ 21.Kf5 (30.29)
Top
BBauer
Posts: 658
Joined: Wed Mar 08, 2006 8:58 pm

Re: Test Position

Post by BBauer »

If 8 procs are not enough try 16 procs.
You will get 50 million nps.
:)
kind regards
Bernhard
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User avatar
Eelco de Groot
Posts: 4669
Joined: Sun Mar 12, 2006 2:40 am
Full name:   Eelco de Groot

Re: Test Position

Post by Eelco de Groot »

Had some problems with it because my "improved" Stockfish razoring started not to detect some of the draws by stalemate, so at the end of the Nxb3 line you would see the King taking the Rook and scoring it as -4.22 and then the score going further and further down until the program stopped playing Nxb3 entirely. I've patched it up a little but I'm not sure about the best way of doing it, maybe I have to redo the razoring again, but there are already so many changes done.

I still don't understand why it would not see stalemate! Quiescence search can't detect stalemate if it does not try to generate all the moves, I understand but why is that only a problem in my version of razoring and not elsewhere? Grr. Anyway, the last version is keeping the Nxb3 line it seems, that is something. But those fast machines some people are using make it difficult to compare the results and Rainbow Serpent is not really built for speed! I have decided to also store the stalemates in the Transposition Table where Stockfish only returns immediately with the draw value but I'm storing it as an exact value, that goes at the expense of other entries but it did give a tiny bit of extra speed here, as you would expect. But maybe that is overdoing it. I am glad though I found one version that did not throw away the stalemate draw!

Eelco


[d]3r3k/4R3/7P/2n5/8/1P6/2B5/2K5 b - -

Engine: Rainbow Serpent 1.5 Build 146 (Athlon 2009 MHz, 128 MB)
by Romstad, Costalba, Kiiski, De Groot

1.00 0:00 -3.59 1...Rf8 (104) 0

2.00 0:00 -4.72 1...Rf8 2.b4 Na6 3.Rh7+ Kg8 4.b5 Rf6
5.bxa6 Rxa6 (8.384) 38

2.00 0:00 -3.95 1...Kg8 2.Rg7+ Kh8 3.b4 Nd3+ 4.Bxd3 Rxd3
5.Kb2 Rd5 (33.039) 132

2.00 0:00 -3.51 1...Nd3+ 2.Kb1 Kg8 3.Bxd3 Rxd3 4.Kb2 Rd6
5.Rg7+ Kh8 (70.352) 224

3.00 0:00 -3.43 1...Nd3+ 2.Kb1 Kg8 3.Bxd3 Rxd3 4.Kc2 Rd6
5.Rg7+ Kf8 6.Rh7 Kg8 (121.434) 337

4.00 0:00 -3.51 1...Nd3+ 2.Kb1 Kg8 3.Rg7+ Kf8 4.Bxd3 Rxd3
5.Kb2 Rh3 (259.182) 473

5.00 0:00 -3.39 1...Nd3+ 2.Kb1 Kg8 3.Rg7+ Kf8 4.Rb7 Ne5
5.b4 Nf7 6.b5 Nxh6 7.Kb2 (475.423) 596

6.01 0:01 -3.47 1...Nd3+ 2.Kb1 Kg8 3.Rg7+ Kf8 4.Rb7 Ne5
5.h7 Nf7 6.Bg6 Nh8 7.Bf5 Rd2 8.Rb8+ Kg7
9.Bc2 (696.455) 685

7.01 0:05 -3.23 1...Nd3+ 2.Kb1 Kg8 3.Rg7+ Kh8 4.Rc7 Kg8
5.Ra7 Kh8 6.Ka1 Kg8 7.Rg7+ Kh8 8.Kb1 Rd6
9.Rc7 Rd8 10.Rb7 Rd4 11.Bxd3 Rxd3
12.Kb2 Rd6 (5.443.365) 954

7.02 0:06 -3.19++ 1...Nxb3+ 2.Bxb3 Rd6 3.Be6 Rb6 4.Kd2 Rb7
5.Bd7 Rb6 6.Be6 (6.947.935) 1006

8.01 0:16 -1.97++ 1...Nxb3+ 2.Bxb3 Rd6 3.Be6 Rb6 4.Kd2 Rb7
5.Bd7 Rb6 6.Be6 (16.793.849) 999

9.01 0:36 -1.65 1...Nxb3+ 2.Kb1 Nd4 3.Bg6 Rf8 4.Re5 Kg8
5.Be4 Kf7 6.Kb2 Rh8 7.Rh5 Kf6 8.Bd3 Ne6
9.Rh1 Kg5 10.h7 Kf6 11.Rh6+ Kf7
12.Kc3 (36.620.696) 1011

10.01 1:01 -1.09 1...Nxb3+ 2.Bxb3 Rd6 3.Be6 Rb6 4.Kd2 Rb7
5.Bd7 Rb6 6.Kc3 Rxh6 7.Bf5 Kg8 8.Kd4 Kf8
9.Rd7 Rb6 10.Be4 (63.024.960) 1030

11.01 1:07 -1.09 1...Nxb3+ 2.Bxb3 Rd6 3.Be6 Rb6 4.Kd2 Rb7
5.Bd7 Rb6 6.Ke3 Rxh6 7.Bf5 Kg8 8.Ke4 Kf8
9.Rc7 Rf6 10.Rh7 Rf7 (70.826.656) 1042

12.01 2:27 -1.05 1...Nxb3+ 2.Bxb3 Rd6 3.Be6 Rb6 4.Kd2 Rb7
5.Bd7 Rb6 6.Ke3 Rxh6 7.Bf5 Kg8 8.Be4 Kf8
9.Ra7 Rd6 10.Rh7 Ke8 11.Bf5 Rf6 (158.817.925) 1073

13.01 5:13 -1.05 1...Nxb3+ 2.Kb2 Nd4 3.Bg6 Rf8 4.Rh7+ Kg8
5.Rb7 Nf5 6.h7+ Kh8 7.Kb3 Ne7 8.Be4 Nd5
9.Kc4 Nf6 10.Bg6 Rd8 11.Kc3 Nd5+
12.Kb3 Nf6 13.Bf5 Nxh7 14.Rxh7+ Kg8 (367.097.941) 1171

14.01 12:58 -1.01 1...Nxb3+ 2.Bxb3 Rd6 3.Be6 Rb6 4.Kd2 Rb7
5.Bd7 Rb6 6.Ke3 Rxh6 7.Bf5 Kg8 8.Kd4 Kf8
9.Rb7 Rf6 10.Ke5 Rf7 11.Rb4 Kg7
12.Rg4+ Kh6 (837.409.946) 1075

15.01 21:23 -1.01 1...Nxb3+ 2.Bxb3 Rd6 3.Be6 Rb6 4.Kd2 Rb7
5.Bd7 Rb6 6.Ke3 Rxh6 7.Bf5 Kg8 8.Kd4 Kf8
9.Rc7 Rf6 10.Ke5 Rf7 11.Rc3 Ke7
12.Rc2 Rg7 13.Rc7+ Kf8 14.Rc8+ (1.377.683.166) 1073

16.01 63:22 -1.21-- 1...Nxb3+ 2.Kb2 Rd1 3.Bxd1 Na1
4.Kxa1 (4.740.115.613) 1246
Debugging is twice as hard as writing the code in the first
place. Therefore, if you write the code as cleverly as possible, you
are, by definition, not smart enough to debug it.
-- Brian W. Kernighan
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F. Bluemers
Posts: 880
Joined: Thu Mar 09, 2006 11:21 pm
Location: Nederland

Re: Test Position

Post by F. Bluemers »

It might be the razoring but it could be nullmove too.
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